extracted from presentation given by robin todd at 2007 ent soc. america meeting icr, inc. robin...
TRANSCRIPT
Extracted from presentation given by Robin Todd at 2007
Ent Soc. America meetingICR, Inc.
Robin Todd, ICR, Inc.
CleanZone
• A non-chemical method that works
• Elevated ozone levels – 100 ppm +
• Ozone Generator
• Confined spaces
• Used for mold elimination
• Bed bugs a new target
Robin Todd, ICR, Inc.
Test
• CleanZone Systems LLC. Lisle, IL
• Conducted study in an empty home
• Showed efficacy
• Asked ICR for independent confirmatory test
Robin Todd, ICR, Inc.
Safety
• EPA’s acceptable level: 0.08 ppm for 8 hours (0.07- 0.075 ppm proposed)
• CleanZone generates 100ppm +
• Test run in green house – safety
• Ozone levels monitored
• CleanZone staff attended test and ran generator
Robin Todd, ICR, Inc.
Test details
• Test chamber built
• 8x18x7ft tall (1008 ft2)
• Plastic sheeting over PVC piping
• Sand snakes hold down plastic
Robin Todd, ICR, Inc.
Bed bug containment & Replication
• 10 containers with screened lids
• 10 containers covered with cloth
• 10 adult bed bugs per container
Robin Todd, ICR, Inc.
Test Chamber
Robin Todd, ICR, Inc.
Control Chamber
• 4x6x7 ft high chamber (168 ft2)
• In a different building – no elevated ozone
Robin Todd, ICR, Inc.
Other species tested
• German cockroaches
• Confused flour beetles
• Pharaoh ants
• American house dust mites
Robin Todd, ICR, Inc.
Containers of insects
Robin Todd, ICR, Inc.
Observations during exposure
• Ozone levels observed hourly
• One container of each species removed hourly
- Knockdown checked = monitors
• Self-sealing port – avoid ozone loss
Robin Todd, ICR, Inc.
Results
• Ozone in test chamber 118.3 ppm (mean)• Generator run for 22.7 hours• Peak (150.7 ppm) at 9 hours• Still air – underestimated levels• Ozone levels in control chamber: 0 – 0.1 ppm
Robin Todd, ICR, Inc.
Ozone levels
Ozone Levels in Test Chamber
020406080
100120140160
1 2 3 4 5 6 7 8 9 10 11
Hours
Ozo
ne
(pp
m)
Robin Todd, ICR, Inc.
Results
• 100% knockdown in monitor containers
for all species except ants
Robin Todd, ICR, Inc.
Results
• Test Chamber - 100% mortality +24 hours after removal from chamber
• 4% mortality in control
Robin Todd, ICR, Inc.
Hourly Knockdown
Bed Bug Knockdown in Monitor
0.00%20.00%40.00%60.00%80.00%
100.00%120.00%
1 2 3 4 5 6 7 8 9 10 11
Hours of Exposure
Open Containers Covered Containers
Robin Todd, ICR, Inc.
Dead bed bugs after treatmentno longer clinging to filter paper
Robin Todd, ICR, Inc.
Other Species
• Treatment killed 100% of roaches and dust mites
• 86% (open) 98% (covered) of beetles
• 40% (open) 83% (covered) of ants– Ants in covered nest containers
– because sheltered from ozone?
Robin Todd, ICR, Inc.
Acknowledgement
• John Sharpe, formerly with ICR, conducted this test. He did a great job.
Robin Todd, ICR, Inc.